Fittet new functions to everying in neural networks. Still need to optimise for uint64_t vs int64_t and vec vs mat in some places.

include/numerics/detail/matmul_serial.h

@@ -3,8 +3,8 @@
 #include <cstdint> //uint64_t
 #include <stdexcept> // std::runtime_error
 
-#include "../utils/vector.h"
-#include "../utils/matrix.h"
+#include "utils/vector.h"
+#include "utils/matrix.h"
 
 namespace numerics::detail{
 
@@ -15,7 +15,12 @@ namespace numerics::detail{
 		const uint64_t n = A.cols(); // also B.rows()
 		const uint64_t p = B.cols();
 		if(n != B.rows()){
-			throw std::runtime_error("matmul: dimension mismatch");
+		    throw std::runtime_error(
+		        "matmul: dimension mismatch: A is " +
+		        std::to_string(A.rows()) + "x" + std::to_string(A.cols()) +
+		        ", B is " +
+		        std::to_string(B.rows()) + "x" + std::to_string(B.cols())
+		    );
 		}
 		T tmp;
 		utils::Matrix<T> C(m, p, T{0});